ty::layout: intern FnAbis as &'tcx.

compiler/rustc_target/src/abi/call/mod.rs

@@ -25,7 +25,7 @@ mod x86;
 mod x86_64;
 mod x86_win64;
 
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub enum PassMode {
     /// Ignore the argument.
     ///
@@ -60,7 +60,7 @@ pub use attr_impl::ArgAttribute;
 mod attr_impl {
     // The subset of llvm::Attribute needed for arguments, packed into a bitfield.
     bitflags::bitflags! {
-        #[derive(Default)]
+        #[derive(Default, HashStable_Generic)]
         pub struct ArgAttribute: u16 {
             const NoAlias   = 1 << 1;
             const NoCapture = 1 << 2;
@@ -77,7 +77,7 @@ mod attr_impl {
 /// Sometimes an ABI requires small integers to be extended to a full or partial register. This enum
 /// defines if this extension should be zero-extension or sign-extension when necessary. When it is
 /// not necessary to extend the argument, this enum is ignored.
-#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub enum ArgExtension {
     None,
     Zext,
@@ -86,7 +86,7 @@ pub enum ArgExtension {
 
 /// A compact representation of LLVM attributes (at least those relevant for this module)
 /// that can be manipulated without interacting with LLVM's Attribute machinery.
-#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub struct ArgAttributes {
     pub regular: ArgAttribute,
     pub arg_ext: ArgExtension,
@@ -127,14 +127,14 @@ impl ArgAttributes {
     }
 }
 
-#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub enum RegKind {
     Integer,
     Float,
     Vector,
 }
 
-#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub struct Reg {
     pub kind: RegKind,
     pub size: Size,
@@ -184,7 +184,7 @@ impl Reg {
 
 /// An argument passed entirely registers with the
 /// same kind (e.g., HFA / HVA on PPC64 and AArch64).
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub struct Uniform {
     pub unit: Reg,
 
@@ -209,7 +209,7 @@ impl Uniform {
     }
 }
 
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub struct CastTarget {
     pub prefix: [Option<RegKind>; 8],
     pub prefix_chunk_size: Size,
@@ -437,7 +437,7 @@ impl<'a, Ty> TyAndLayout<'a, Ty> {
 
 /// Information about how to pass an argument to,
 /// or return a value from, a function, under some ABI.
-#[derive(Debug)]
+#[derive(PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub struct ArgAbi<'a, Ty> {
     pub layout: TyAndLayout<'a, Ty>,
 
@@ -545,7 +545,7 @@ impl<'a, Ty> ArgAbi<'a, Ty> {
     }
 }
 
-#[derive(Copy, Clone, PartialEq, Debug)]
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub enum Conv {
     // General language calling conventions, for which every target
     // should have its own backend (e.g. LLVM) support.
@@ -579,7 +579,7 @@ pub enum Conv {
 ///
 /// I will do my best to describe this structure, but these
 /// comments are reverse-engineered and may be inaccurate. -NDM
-#[derive(Debug)]
+#[derive(PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub struct FnAbi<'a, Ty> {
     /// The LLVM types of each argument.
     pub args: Vec<ArgAbi<'a, Ty>>,